216 U. Ss. P. R. R. EXP. AND SURVEYS—ZOOLOGY—GENERAL REPORT 
TURDUS SWAINSONII, Cab. 
Olive-backed Thrush. 
Purdus swainsonii, Cas. in Tschudi F. Peruana, 1844-’46, 188.—-Is. in V. Homeyer’s Rhea, II, 149.—Is. Mus, Hein. 
1850, 5. (Siberia.) 
2 Turdus brunneus, Boppaert, Tab. Pl. enl. 1783, according to Gray in Genera. Based on PI. enl. 556, f. 2. 
Turdus minor, Gu. Syst. Nat. I, 1788, 809. (Combined with T. fuscescens.)—Vieitior, Ois. Am. Sept. II, 1807, 7; 
pl. Ixiii. (Mixed with T. pallasii )—Bon. List. 1838.—Is. Conspectus 1850, 271. ; 
22 Turdus fuscus, Gmewin, Syst. Nat. I, 1788, 817. (Mixed with T. mustelinus?) 
Turdus solitarius, Witson, Am. Orn. V, pl. xiii, fig. 2, (figure only.)—Sw. F. Bor. Am. II, 1831, pl. xxxvi, (figure 
only.) 
Merula wilsonti, Sw. F.B. A. II, 1831, (not the figure.) 
Turdus olivaceus, Giraub, Birds Long Island, 1843-’44, 92, (not of Linn. or Bodd.)—Brewer, Pr. Bost. Soc. N. 
H. July, 1844, 191. 
Little Thrush, Pennant, Arctic Zool. II, 1785, 338. 
Se Cu.—Third quill longest ; second and fourth but little shorter, and much longer than the fifth ; (by .35 of an inch.) 
Upper parts uniform olivaceous, with a decided shade of green. The fore part of breast, the throat and chin, pale brownish 
yellow ; rest of lower parts white ; the sides washed with brownish olive. Sides of the tnroat and fore part of the breast with 
sub-rounded spots of well defined brown, darker than the back ; the rest of the breast (except medially) with rather less distinct 
spots that are more olivaceous. Tibiae yellowish brown. Broad ring round the eye. Loral region, and a general tinge on the 
side of the head, clear reddish buff. Length, 7.00; wing, 4.15; tail, 3.10; tarsus, 1.10. 
Hab.—Eastern North America to the Black Hills ; south to Mexico and Peru; north to Greenland. Accidental in Europe | 
and Siberia. 
This species is at once distinguished from the others by the perfectly uniform and pure dull 
olivaceous shade of its upper parts, most strongly marked and appreciable on the rump and tail. 
The throat and breast are, perhaps, more reddish than in any of our species, and the tinge in 
the marking on the side of the head is very much more decided than in any other. The spots 
on the breast larger than in 7’. ustulalus, and rather more numerous than in pallasi. 
List of specimens. 
| | 
Catal. | Sex. Locality. When col- | Whence obtained. | Orig. Collected by— |Length.| Stretch) Wing. Remarks. 
No. lected. No. of wings. 
May 18, 1843 | 8. F. Baird.... ... : 11.50 
May 3, 1845 | ve Henpsoged 6 12.08 
May 18, 1843 ; .50 
May 16, 1845 | 
May 12, 1846 |, 
May, 1841 
May 13, 1842 | 
May 15, 1857 | 
981 Q Carlisle, Penn. ... 
Iris brown; bill 
black and yel- 
low; feet brown. 
4324 |oeeees Caleasieu Pass, La...... | 1854.......-. Ge VVUrd EmANMs o)|| <ciessillstelss oe cicie.clel-)eie.eaieveic'i|lcicisele'e) elo} oleieisiainigln)| bleleisiuis.oillleinlalatnetetsisiate a cenene 
5657 | Gi | Rep. Fork, 40 miles west | Jan. 25...... Breet oBrvanicscd| seca. W.S. Wood....... 7c 00' nae ove a.o% |seomacaelacieematseacree ecto 
of Fort Riley. | 
4707 | Opposite mouth Vermilion} May 8, 1866 | Lt. Warren .. Dr. Hayden... 6.75 | 11.37 
4710 | @ Nebraska...eceseee seeee|-ceeee eens aoe | seeeee dO. .cccccecsen|scvees|.ccces dO....006 7.25 | 11.87 
8818 3} Black: HillS sceeescs, ese. Sept. 18.. ... oonead OO wericteiaieiete eveiall ccieteetsi| iretetnieys Gb Gersacde code ail 11,12 
SQUSI hee. Fort Laramie, Nebraska..| Sept. 10,1857 | Dr. J. G. Cooper. ..| 197 | seeeessesaeceeeesee 7.37 12.00 43001) cecetistes 
| John Gould... sss.) scene noone doodadcosonogs||yocenocs ececccccleocecs s|cevncececceecccese 
1948 |ccee- MEXICO cccccccecs cecevres| secerececcnes 
